Add missing arg to validate call and add logging

health/services.py

@@ -37,7 +37,8 @@ def _check_storage(app):
   try:
     storage.validate(storage.preferred_locations, app.config['HTTPCLIENT'])
     return True
-  except:
+  except Exception as ex:
+    logger.exception('Storage check failed with exception %s', ex)
     return False